Strain insulator



March 31. 1925. 1,531,662

v w. H. KEMPTON STRAIN INSULATOR AF11e 1 oet, 17, L18A WITNEssEs; INVENTOR Wil/ard h. Kem/afan.

C96@ H72. 4 BYZ LU. f ATT'ORNEY atented Mar. 31, i925.

PATENT ermee..

A GGREDRAmIQN OFl STRAIN meenemen.

To all cle/:m '7203/ concer/n:

' f tl l, lla/Trennen' itl'. Keilro't 11 United States, and a rinsenrg, in the county vot e ers5 et which the following is n relate train iilenlater,

'ts pr object trl-e eeneh ins by employing tor el heldin spaced o 'ers ol' my intention is the preineulatrers of such construcoe highly rene-ain to 'ns s,A 'n any direction.

other object ot my invention is the construe Strain insulators which, be-

ine' ni ed y Wille.temperature changea7V i ture, oils, Weak acidi; and allelis` may 7 b employeeL ander adverse atn'ioepne'rie eenlihtiene.

still further object of my invention is the proyiei n ot" easily constructed, compact Stn` n insulatorspossessing high insulating qualitiesand great mechanical strength.

YWith theseV andV otl-ier'objectein ViewQ my invention will be more fully described, illusin the d erring, in which like nnr parti@ f* pointed ont claims; n the drawings, Fig. l' is any end View,

i section and partly infelevatien, of a insulator emeodying my invention; and Fig. 2 is a 'plan View7 partly in eleva tioi and gartly in section, of the @tra in insulator shown in Fig; l. Y

ln practicing my invention, l' may constructstrain insulator by iirstV pretorming a plate or spacer member by stacking sheets et Vsuitable size and material, impregnated with a. binder, the sheets being stacked until a proper thie mess has been reached, atter which they may be subjected to heat and pressure to compact the material and harden the binder.

Connecter elemente may be formed ojt Wires or other suitable material by bending each Wire so that a loop, having e); ending ends Substantially parallel t each other, is formed and the extending parallel ends may Serial No. 258,45212,

bey ronghned in any suitable manner; il loop thee formed may be' placedat eachy end` of the spaeer member or plate inl sneh extending parallel ends c* trie side manner that tie the loop may engage Spacer member and be:ond it.

edg o tl imay projee inipregnate' r then be wenn fi.' n y oe eoL t K, @reforming a spacer meinbe" o? sheet material impregnated with a Suitable bineer Such, for instance7V a enolie eonde isation produ/ct. The ehet material impregnated with a binder may he tacked to Suitable thiol'- ness and subjectedA to heat and preseure to compact it and har len the binder. The spacer member?,r is prete ably constructed in this; Way but may consist et a plate of' anyv Suitable insulating material.

Connector. elements 3 may be formed by bending Wiresor other suitable elemente so that loops, haying extending ends il, enhetantially `parallel to each other, may be provided. The en, l may be ro .ohened by twisting or'bending them or they may be reughened by grooving their surfaces,` and a conne-tor element thus formed may be placed at each end of the spacer member i2 sothat the ends el may engage the side edges et theA Spacer member andl the loops may project bevond it.

A sheet material 5, which may be paperv` duck, cetton batting or any other librerie material may be impregnated Vith a suitable binder, such as a phenolic condeneatioi product, and then dried to facilitate its handling. The Sheet material thus treated may be wound about the spa er member Q and the ends of the connector elements 23 until a desirable thiclmees has been reached7 after which the body may be plaeed in a mold and subjected to heat and pressure to compact the material 5 and to harden i in u;

the binder with Which it is impregnated.V

Well as great mechanical strength, Whener g ployed Vas abinder for iribrous material. A.

strain insulator formed as herein disclosed, l

after being subjected to heat and pressure, possesses great mechanical strength and is very compact, as Well as possessing high in# sulating qualities.

Although l have described speciically a strain insulator embodying my invention, it

is obvious that minor changes maybe made in the construction thereof Without departing from the spirit of my invention and l desire, therefore, that only such limitations shall be imposed as are indicated in the appendediclaims. i Y

I claim asi my invention: l. A method of constructing strain insulators that comprises preforming an insulating spacer member, disposing loop connector elements at the ends thereof, the ends or" said elements being on opposite sides ot saidmember and securing the connector elements in place byV winding layers of impregnated sheet material about tlieends of the connector elements and the spacer member.

2. 'A method of constructing strain insulators that comprises stacking' sheets of materialimpregnated with a phenolic condensation product, subjecting the stacked sheets to heat and pressure,`bending Wires to form loops leach of which lhas projecing substan-v tially parallel ends, disposing a loop at each end ci the spacer member in suoli manner that the parallel ends engage the sides oli the spacer member and the loops extend beyond it, winding sheet material impregnated with aphenolic condensation product about the ends` ot the wires and-the spacer member and subjecting the body thus formed to heat`V and pressure.

3. A. method of constructing straininsulators that comprises preiorming an insulating spacing member, disposing loop connector elements at the ends thereof, the ends of said elements bein@` p on opposite sides of said meii'iber, securing the connector elements in place by Winding iinpregifted sheet material about the ends of the connector elec 'l the spacer member and applying heat and` pressure to the body thus assembled to coiipact the material and to harden the binde". A method ot constructing str comprises impregnating a plurality `ts ot fibrous maL l, stacking the pressure theretoto compact the teiial and tov harden the binder, disposV connector elements atthe ends there-ot and securing the connector elements in place :by vinding impregnated sheet material al .ut Vthe ends the connector elements and the spacer member.V

e 5. ifi. methodot constructing strain insulathat comprises iinpregnatiiig a plurality ot nbr us material, stacking the` sheets sheets to 'torni a Ycomposite plate odesirable thiclmess, applying ieat and pressure. .there-y to to compact theV material and to harden the binder, disposing connector elements at the ends thereof, 'impreg` a sheet of fibrous m :serial with a binder andV Windine' Y r the impregnated sneetniaterial aboutrthe ends ci* the connector elements and the spacer' memberA and applying heat and Ypressure to the body tins assembled to compact the last mentioned i'ibious mat i'ialand to harden the binder contained therein.

6. method of forming a strain insulator that comprises iinpregnating a sheet of brons material with a bi der, positie-nino' avpair ci connector elements at opposite ends of an insulating spacer element, Winding the treated sheet about the spacer element and adjacent ends the conductor elements to form a 'sl-.cer containing a plurality of ccnvolutions or the sheet material and subjecting vthe article thus assembled to heat and lnV testimonyl Where-Zot, have hereunto subscribed my name this 25th day of Sep# tembcr, 1918.- Y

lVLLiitl) YEIPTUN.

liin insula- 

